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8971063 Grid tied inverter, system and method including a buck-boost mode  
A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising a DC to DC current fed push-pull converter operable to generate a current waveform from a DC voltage...
8929104 Flow control system  
The present invention provides a new type flow control system comprising a valve control circuit and a power source circuit. Two terminals of the primary coil of the power source circuit...
8923016 Solar module for generating a D.C. voltage and method for its operation  
A solar module has a solar cell which generates a DC voltage. The module has a converter for converting a DC voltage fed into its input. The module contains a semiconductor switch and a controller...
8903263 Switching power supply device using switching regulator  
A power supply device includes, for example, a switching element, a rectifying circuit having a first rectifying element, and a control circuit which controls an output of the rectifying circuit....
8878456 Filter device  
A filter device (10) for filtering high-frequency interferences, such as due to switching flanks of a DC converter, has a current path (4) between an input (2) and an output (3), and an inductor...
8855558 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8831513 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8817498 Hybrid control techniques for series resonant converter  
A DC to DC converter system, includes inverter circuitry having a first and a second switch, the inverter circuitry further configured to generate a first and a second gate control signal, the...
8804382 Resonant controller circuit and system with reduced peak currents during soft-start  
A circuit includes a first control output adapted to couple to a control terminal of a first transistor and a second control output adapted to couple to a control terminal of a second transistor....
8787044 Energy recovery snubber circuit for power converters  
An energy recovery snubber circuit for use in switching power converters. The power converters may include a switch network coupled to a primary winding of an isolation transformer, and...
8742691 Load driving circuit  
A main transformer is arranged such that a load is connected to its secondary winding side. A first error amplifier generates a feedback signal that corresponds to the difference between a...
8711580 Resonant conversion system with over-current protection processes  
A resonant conversion system is provided, in which a resonant converter receives an input voltage to generate an output voltage, and a buck converter provides the input voltage of the resonant...
8699237 Soft-switching inverter utilizing high step up ratio circuit with active clamping  
An inverter with soft switching is used for a high step-up ratio and a high conversion efficiency. The inverter includes an isolation voltage-quadrupling DC converter and an AC selecting switch....
8659916 Control circuit with ZVS-lock and asymmetrical PWM for resonant power converter  
A control circuit for a resonant power converter and a control method thereof are disclosed. The control circuit comprises a first transistor and a second transistor switching a transformer...
8654546 Method and apparatus for controlling resonant power converter  
A control circuit of a resonant power converter is disclosed. The control circuit comprises a first transistor and a second transistor for switching a transformer and a resonant tank comprising a...
8634214 Current resonance power supply with AC input detection into the primary winding  
A current resonance power supply includes a transformer having a primary winding and a secondary winding, two switching elements connected to one end of the primary winding of the transformer and...
8625310 Method of supplying power, power supply apparatus for performing the method and display apparatus having the apparatus  
A power supply apparatus includes an AC-DC rectifier, a transformer, a feedback inductor, a resonant unit, and a primary and auxiliary switch. The AC-DC rectifier rectifies an input voltage. The...
8593836 Power converter using soft switching method for zero current switching at turn on and zero voltage switching at turn off  
A power converter includes a main switch to which a capacitor is connected through a sub-diode. A series connection of a primary coil of a transformer and a sub-switch is connected parallel to the...
8593835 Duty balancing oscillator  
The present invention relates to an oscillator that is capable of realizing duty balancing. The oscillator determines a switching frequency of a converter converting an input voltage according to...
8467204 High voltage power supply  
A high voltage power supply is provided. The high voltage power supply includes an inverter which converts a DC voltage input to the high voltage power supply into a first AC voltage, a...
8466663 Method and power supply system for preventing functional impairing transient noise within high frequency operated integrated circuits  
According to prior art, a clock frequency increase for clocked high-frequency integrated circuits, in particular microprocessors, reaches a current physical limit of approximately 3 GHz, as...
8351856 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8346167 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8346166 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8339817 Method of operating a resonant power converter and a controller therefor  
A method of operating a resonant power converter(1, 2), having a high side switch(3) and a low side switch(4), is disclosed in which the switching is controlled to allow for improved operation at...
8331113 Resonant switching circuit for harmonic suppression of input current utilizing frequency modulation  
The invention discloses a control circuit for an AC-DC converter. The control circuit includes a power control circuit for comparing an input current sensing signal generated by sensing an input...
8315561 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8301080 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8301079 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8190932 Power supply converting circuit  
A power supply converting circuit includes a multi-phase pulse-width modulation (PWM) controller, a single-phase PWM controller, some first voltage converting circuits, a second voltage converting...
8169795 Audio power conversion system  
An audio power conversion system includes a power supply having a positive supply rail and a negative supply rail for supplying power to a single ended class D amplifier. The system further...
8115563 Pulse width modulation circuit and voltage-feedback class-D amplifier circuit  
The frequency characteristic of a voltage-feedback class-D amplifier circuit for driving an output load is improved. A triangular-wave correction circuit which compensates a gradient of a...
8116683 Adaptive inductive power supply with communication  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
8054651 Simple and effective self regulating inductive power transfer system  
An inductive power transfer system for coupling a power source to a load across an air gap is provided, including a primary unit and a secondary unit separable from the primary unit and arranged...
8051317 Power supply with remotely adjustable output  
A power supply system allowing remote adjustments of the power output of the power supply unit without having to physically access the power supply unit itself is disclosed. A power supply system...
8014177 Switching power supply with pulse frequency modulation control  
A switching power supply exhibits high conversion efficiency and facilitates reducing the size thereof. The switching power supply includes a half-bridge circuit including a first series circuit...
7953369 System and method for inductive power supply control using remote device power requirements  
An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating...
7898832 RV converter with current mode and voltage mode switching  
A switched mode converter is disclosed that includes mode logic for switching between voltage mode and current mode. The converter includes sensing circuitry for sensing current on the primary...
7893648 Stepping motor driving device, sheet processing device, and image processing apparatus  
A stepping motor driving device drives a stepping motor according to a drive pulse of a step signal. A phase matching unit matches, at a time when there is a possibility that a rotor and a phase...
7872546 Multi mode modulator and method with improved dynamic load regulation  
A dual mode modulator is proposed for driving a power output stage having a serial connection of high-side power FET and low-side power FET. The dual mode modulator includes a PWM modulator...
7859866 Controller IC, DC-AC conversion apparatus, and parallel running system of DC-AC conversion apparatuses  
A DC power source voltage is supplied to a center tap of a primary winding, and first and second semiconductor switches alternately turned on are disposed between each of both ends of the primary...
7808803 Inverter circuit with transformer having balanceable input currents  
An exemplary inverter circuit (200) includes a direct current (DC) input terminal (210); a transformer (230) including a first primary winding (231) and a second primary winding (232); a first...
7804379 Pulse width modulation dead time compensation method and apparatus  
Dead time compensated complementary pulse width modulation (PWM) signals are derived from a PWM generator by first applying time period compensation to the PWM generator signal based upon the...
7796409 Multilevel push pull power converter  
A power converter for converting an input voltage (Vin) into an output voltage (Vout), comprising a first supply potential and a second supply potential established by the input voltage, and at...
7787265 Self-coupled driver used in dual-switch forward power converter  
A dual-switch forward power converter, and a method of operating the same, employs a self-coupled driver to achieve among other advantages higher efficiency, lower part count and component cost....
7782636 RV converter with current mode and voltage mode switching  
A switched mode converter is disclosed that includes mode logic for switching between a voltage mode and a current mode. The converter includes circuitry for sensing current on the primary side of...
7777587 Minimum pulse width for pulse width modulation control  
The rising edge of a pulse width modulated output signal occurs after an input ramp signal starts to rise. The ramp signal starts to rise after the rising edge of a periodic set signal and before...
7778529 Method for supplying electrical power to a DC motor which can be commutated electronically via a semiconductor power output stage  
A method is proposed for supplying electrical power to a DC motor (16) which can be commutated electronically via a semiconductor power output stage (28), preferably a three-phase DC motor,...
7741803 Apparatus and method for driving 2-phase SRM  
Disclosed is an apparatus and method for driving a 2-phase SRM capable of individually performing an initial driving by an initializing sensor and a normal driving by a driving sensor, and capable...
7733670 Bidirectional active power conditioner with DC/AC inverter in low-frequency switching  
A bidirectional active power conditioner includes a DC side, a bidirectional DC/DC power converter, a DC/AC inverter and an AC side. The DC side electrically connects with a DC source while the AC...

Matches 1 - 50 out of 298 1 2 3 4 5 6 >